Aside from Wind and Light which I prob need another SSR to tell what I lack and possibly even get a team going, it feels like all of my other elements can benefit very well from MT.
As for what element I like playing best, this is a little hard to answer. My fire team does a lot more damage per hit/spell compared to my other teams. My water team has more defenders than I need, but all 4 KH has very good synergy with each other so I end up doing decent damage. Living a lot longer also lets me pump out more damage in raids.
Can't say much for my Thunder and Dark teams as they were put together and leveled(both kh and weapon sklvl) hastily for tower and advent event. But I do see their strengths and definitely find both to be fun as well.
I might have to agree that in terms of my Dark team, it's in the best spot because there is synergy with and the Himes don't exactly have "upgrades" unlike my water team.
Just to make sure I'm not doing it wrong, my Dark team consists of Satan+Pluto staple, mainly running Kati+Chernobog for a faster burst team, Amon+Chernobog for rage control, and Amon+Paimon for AABing easy stuff. I assume this is why you mean it is in the best spot?
My Water team feels like it has a very good foundation for a team, but other than Ryu-Oh each hime has one or two better alternatives if I'm trying to "perfect" the team.
Thunder also has many possible choices I can choose from for 4th slot, but at the same time it feels like making-do with Ramiel is enough as well.
My Fire team probably has the worst and messiest foundation despite having the best weapon grid, but a good thing is the MT choice isn't as difficult. It's either Uriel of Svarog.
It does feel like my option would be more limited to either Fire or Thunder. Thunder and I get another 4 SSR elemental team at the cost of weaker mid-term potential. Also doesn't help with the fact water tower just ended.
Fire to finally replace Heph for the second carry I've been needing all this time.
I really don't know how I should proceed from here. If only I had an 100% eidolon it might've been an easier pick. I do have Anubis but I don't have the 5 extra, or was it 4, eidolons to hit 100%. Even if I did, my Dark team probably doesn't need the MT.
Sorry for ranting half the time. It seems like my options are too little yet too many at the same time and so I just can't come to a decision by myself without opinion and advice.